Very possible. But also possibly not. If police arrested him on the spot and had access to his clothing and still found no gunshot residue there, then there's little they can do. You can wash off the residue quite easily... but that requires washing. Which would take time. Thus, Barajas needed to somehow shower and dispose of bloody clothing with gunshot residue (and a gun) where no one could find it, then go back and get himself bloody and grieving again in the five minutes it took for police to get there.
According to the timeline given in other articles, it was just five minutes from the gunshot till the police arrival. Very little time to do all of that. And Barajas was already on the phone to 911 before the gunshot, so he was expecting police to arrive, but he didn't know when.
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Shot the guy? I would have strangled him with my bare, bloody hands. Temporary insanity is a legitimate defense in these cases.
Ang pagbalik ng comeback...
Remember the golden rule, "Don't do to others what others don't want to do unto you". The moron driver in a rural road can easily hit a lot of open space but why aim for the 3 Barajas? Banda's claim it was an accident, so he was accidentally shot as well.
Justice was immediately served upon Banda's death.
"My two boys are dead and nothing will bring them back," - Barajas
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Killing the drunk driver won't bring his sons back. Plus him killing the drunk driver is not a punishment. Killing the driver actually prevented a prison term which would have been a better option if the father wanted the driver to really suffer.
For me, this is a bad precedent.
I may have missed this tiny piece of fact, but what was the father's testimony explaining how the DUI suspect was shot?